The tiny island state 2,500 miles from the nearest continent is so critical to the nation's modern corn-growing business that the industry's leading companies all have farms here, growing new varieties genetically engineered for desirable traits like insect and drought resistance.

But these same farms have become a flash point in a spreading debate over genetic engineering in agriculture.

Kauai and Hawaii counties have moved in the past several months to regulate genetically modified organisms and the pesticides the farms use. In Maui County, a group is collecting signatures for a potential ballot measure that would impose a temporary ban on the crops.